auditd: add possibility to override config template (#685)

* make template overrideable

by referencing the auditd.conf.j2 template, a custom template can be provided to the role.

Signed-off-by: Dennis Lerch <[email protected]>

* extend auditd config

make freq and log_file configurable
implement write_logs with it's default value in order to be able to disable log writing

Signed-off-by: Dennis Lerch <[email protected]>

* Extend README.md documentation by new variables

reorder `os_auditd_log_format` to keep sequence from defaults

Signed-off-by: Dennis Lerch <[email protected]>

---------

Signed-off-by: Dennis Lerch <[email protected]>

roles/os_hardening/defaults/main.yml

@@ -332,9 +332,13 @@ os_hardening_enabled: true
 
 # Set to false to disable installing and configuring auditd.
 os_auditd_enabled: true
+os_auditd_template: etc/audit/auditd.conf.j2
 os_auditd_flush: INCREMENTAL
+os_auditd_freq: 20
 os_auditd_max_log_file: 6
 os_auditd_max_log_file_action: keep_logs
+os_auditd_write_logs: true
+os_auditd_log_file: /var/log/audit/audit.log
 os_auditd_log_format: RAW
 os_auditd_admin_space_left: 50
 os_auditd_space_left: 75